#pragma once

#include <iostream>

// from https://stackoverflow.com/a/8244052

class NulStreambuf : public std::streambuf {

  char dummyBuffer[64];

protected:

  virtual int overflow(int c) override final{

    setp(dummyBuffer, dummyBuffer + sizeof(dummyBuffer));

    return (c == traits_type::eof()) ? '\0' : c;

  }

};

class NulOStream final : private NulStreambuf, public std::ostream {

public:

  NulOStream() : std::ostream(this) {}

NulOStream::NulOStream()

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  NulOStream() : std::ostream(this) {}

Unexecuted instantiation: NulOStream::NulOStream()

  NulStreambuf *rdbuf() { return this; }

};